<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :addTodo="addTodo"
      :todoList="todoList"></Header>
      <List 
      :todoList="todoList" 
      :changeCheck="changeCheck"
      :deleteOne="deleteOne"
      />
      <Footer 
      :checkAll="checkAll"
      :todoList="todoList" 
      :deleteSome="deleteSome"
      ></Footer>
    </div>
  </div>
</template>

<script>
import Header from "@/components/Header";
import Footer from "@/components/Footer";
import List from "@/components/List";
export default {
  name: "App",
  components: {
    Header,
    Footer,
    List,
  },
  data() {
    return {
      todoList: [
        { id: "001", done: false, content: "吃饭" },
        { id: "002", done: false, content: "睡觉" },
        { id: "003", done: false, content: "打豆豆" },
      ],
    };
  }, 
  methods: {
    //新增一个
    addTodo(newItem) {
      this.todoList.unshift(newItem);
    },
    //是否选中
    changeCheck(id) {
      this.todoList = this.todoList.map(item => {
       if( item.id === id) item.done = !item.done;
       return item;
      })
    },
    //是否全选
    checkAll(newDone) {
      this.todoList = this.todoList.map(item => {
        item.done = newDone;
        return item;
      })
    },
    //删除一个
    deleteOne(id) {
      this.todoList = this.todoList.filter(item => item.id !== id);
    },
    //批量删除
    deleteSome() {
      this.todoList = this.todoList.filter(item  => !item.done);
    }
  },
  mounted() {
    this.todoList = JSON.parse(localStorage.getItem('todoList') || '[]');
  },
  watch: {
    todoList: {
      deep: true,
      handler() {
        localStorage.setItem('todoList', JSON.stringify(this.todoList));
      }
    }
  }

};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
